Dual-functional Au–Fe3O4 dumbbell nanoparticles for sensitive and selective turn-on fluorescent detection of cyanide based on the inner filter effect

Abstract

We demonstrate for the first time that bifunctional Au–Fe₃O₄ dumbbell nanoparticles can be used for sensitive and selective turn-on fluorescent detection of cyanide based on the inner filter effect, and a “magnetic concentration–washing process” is proposed to effectively reduce the interference of dye pollution.